Home / mailings

PDF

[gentoo-announce] [ GLSA 201702-23 ] Dropbear: Multiple vulnerabilities

Posted on 21 February 2017
Gentoo-announce

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--5mG2T1plBwjdLSLtumUIM1TbofSO6LVvD
Content-Type: multipart/mixed; boundary="VrD7fqcu6xqU0tPFpCStfRBJLuJI6ckQ5";
protected-headers="v1"
From: Thomas Deutschmann <whissi@gentoo.org>
Reply-To: security@gentoo.org
To: gentoo-announce@lists.gentoo.org
Message-ID: <6d811a9c-9cef-d02b-5e69-95b186e6b845@gentoo.org>
Subject: [ GLSA 201702-23 ] Dropbear: Multiple vulnerabilities

--VrD7fqcu6xqU0tPFpCStfRBJLuJI6ckQ5
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 201702-23
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: Dropbear: Multiple vulnerabilities
Date: February 20, 2017
Bugs: #605560
ID: 201702-23

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========
Multiple vulnerabilities have been found in Dropbear, the worst of
which allows remote attackers to execute arbitrary code.

Background
==========
Dropbear is an SSH server and client designed with a small memory
footprint.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/dropbear < 2016.74 >= 2016.74

Description
===========
Multiple vulnerabilities have been discovered in Dropbear. Please
review the CVE identifiers referenced below for details.

Impact
======
A remote attacker could possibly execute arbitrary code with root
privileges if usernames containing special characters can be created on
a system. Also, a dbclient user who can control username or host
arguments could potentially run arbitrary code with the privileges of
the process.

In addition, a remote attacker could entice a user to process a
specially crafted SSH key using dropbearconvert, possibly resulting in
execution of arbitrary code with the privileges of the process or a
Denial of Service condition.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
All Dropbear users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/dropbear-2016.74"

References
==========
[ 1 ] CVE-2016-7406
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7406
[ 2 ] CVE-2016-7407
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7407
[ 3 ] CVE-2016-7408
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7408
[ 4 ] CVE-2016-7409
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7409

Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/201702-23

Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======
Copyright 2017 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5


--VrD7fqcu6xqU0tPFpCStfRBJLuJI6ckQ5--

--5mG2T1plBwjdLSLtumUIM1TbofSO6LVvD
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

 

TOP